Great !
I have neglected the Hornady 250-gr Monoflex.
Might take faster powder than H4198, but that is a great place to start.

At gunner500's comment on correcting 5-yard chrono velocity to MV:
It occurs to me that a table or graph might be handy.
BC vs MV.
Higher BC less loss.
Higher MV more loss over that first 5 yards ...

Ron aka "Rip" for Riflecrank Internationale Permanente
NRA Life Benefactor and Beneficiary
.458 Winchester Magnum, Magnanimous in Victory
THE WALKING DEAD does so remind me of Democrap voters. Donkeypox.